The Pinyin and Chinese characters for the sentence you mentioned are:
Zhè dàyuē yào huā shí gè bàn xiǎoshí.
这大约要花十个半小时。
It takes about ten hours thirty minutes.
Learn words in this sentence:
“花” can be used as both noun and verb. As a noun, it refers to flower. As a verb, it mean “to cost, to spend.”
For examples:
玫瑰花很漂亮。
The rose is beautiful.
Wǒ wǔcān huā le shí yuán.
我午餐花了十元。
The lunch cost me ten Yuan.